Don't execute OpsTask which will have no effect on their target.

Change-Id: Ia58555e7387ef0f80893a58150b3f76d77c26d6e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/244896
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrOpsTask.h b/src/gpu/GrOpsTask.h
index 0539eab..a8588ce 100644
--- a/src/gpu/GrOpsTask.h
+++ b/src/gpu/GrOpsTask.h
@@ -269,6 +269,7 @@
     SkTArray<GrTextureProxy*, true> fSampledProxies;
 
     SkRect fTotalBounds = SkRect::MakeEmpty();
+    SkIRect fClippedContentBounds = SkIRect::MakeEmpty();
 };
 
 #endif